GS1100EX Regulator/Rectifier

[bonanzadave]

Later I will post some pictures.

Regards

Please do. Just to make sure hookup is correct. Grounds are important. Is the SH775AA mounted to a plastic fender ? Fuses are all good ? Batt good ?

I think your stator output is fine. Its the SH775AA or your wiring. Im OK when my bike voltmeter shows 13.8 - 14.3vdc and it normally does at or above 2-3k rpm.

 

[posplayr]

I did a quick scan and I don?t see anywhere where the op tested the stator. Leg-leg and leg-gnd at 5k rpm. Weak stator would explain why charging cannot reach full voltage under full load.

 

[bonanzadave]

op tested the stator.

With the motorbike just started I get just 80 volts AC in two of the connections and in other near 80 (between 75-79)

 

[posplayr]

With the motorbike just started I get just 80 volts AC in two of the connections and in other near 80 (between 75-79)

By far the most productive test is leg ground not leg leg.

 

[Sparkie]

Thank you bonanzadave and posplayr for your quicks answers. The SH775A it's mounted in the bike provisionally not the definitive, is mounted only for testing, not for riding (it's hanging on a flange). All the fuses are news, the battery it's new too. The general wiring in the bike.... uffff... I don?t like it very much :/ .... Could be a bad lead or connection, but Which?... I wouldn't know where to start.

Tomorrow I will take some pictures so you can see it better.

 

[posplayr]

Thank you bonanzadave and posplayr for your quicks answers. The SH775A it's mounted in the bike provisionally not the definitive, is mounted only for testing, not for riding (it's hanging on a flange). All the fuses are news, the battery it's new too. The general wiring in the bike.... uffff... I don?t like it very much :/ .... Could be a bad lead or connection, but Which?... I wouldn't know where to start.

Tomorrow I will take some pictures so you can see it better.

Normally you could report the 6 voltages of the Quick test results and we can help you diagnose the charging system. However in this case I would suspect the stator and as yet you don't seem to have tested it exhaustively.

The Phase B tests involve the stator separately from the rest of teh charging system. The leg to ground is the most useful. You can ignore the ohm meter test they are included for historical completeness despite being an irrelevant distraction.

https://www.thegsresources.com/statorpapers4.php

 

[Sparkie]

Normally you could report the 6 voltages of the Quick test results and we can help you diagnose the charging system. However in this case I would suspect the stator and as yet you don't seem to have tested it exhaustively.

The 6 voltages of Quick test are perfect in my bike with lights off. Perfect, perfect, perfect. But when I swich on the light (front head) or I keep footle/step the rear break pedal, the 6 voltages don?t go more than 12 - 12.5 in any rpm.

 

[posplayr]

The 6 voltages of Quick test are perfect in my bike with lights off. Perfect, perfect, perfect. But when I swich on the light (front head) or I keep footle/step the rear break pedal, the 6 voltages don?t go more than 12 - 12.5 in any rpm.

I have no idea what perfect means as it is the interrelationship of these voltages that provide the clues to diagnose the problems with your bike. Do you still have low voltages with headlights on? Is you them how can you possibly have perfect voltages?

 

[Sparkie]

With "perfect" I want to say that the bike in each one of the 6 steps the voltages are correct according to the test values. But ALWAYS with all the LIGHTS OFF.

In the moment I SWITCH ON some light (Front Head, Rear Brake), the voltage in steps 3, 4 and 5 (1500 rpm, 2500 rpm and 5000 rpm) don?t exceed 12 - 12.5 v

I'm sorry for my English ^^!

 

[posplayr]

With "perfect" I want to say that the bike in each one of the 6 steps the voltages are correct according to the test values. But ALWAYS with all the LIGHTS OFF.

In the moment I SWITCH ON some light (Front Head, Rear Brake), the voltage in steps 3, 4 and 5 (1500 rpm, 2500 rpm and 5000 rpm) don?t exceed 12 - 12.5 v

I'm sorry for my English ^^!

Other than Steps 1 and 6 (Key Off) all the Quick test steps are with the lights ON !

In the US we have mandatory lights on while so all bikes (since about 1982) are wired lights on with key on.

In the moment I SWITCH ON some light (Front Head, Rear Brake), the voltage in steps 3, 4 and 5 (1500 rpm, 2500 rpm and 5000 rpm) don?t exceed 12 - 12.5 v

I'm sorry for my English ^^!

You probably do not have enough power coming from your stator and so the charging system can not deliver power/voltage under standard loads.

You can neither just replace the stator or try to get some confirmation first from the leg to ground tests. They shoudl report ZERO VAC.
You will also probably find a burned stator.

 

[bonanzadave]

Grounds are important. Is the SH775AA mounted to a plastic fender ?

the casing of the R/R is normally the negative lead to the frame.

Just something I read.......Try jumping the case of the RR to ground. Just checkin.....

 

[posplayr]

the casing of the R/R is normally the negative lead to the frame.

Just something I read.......Try jumping the case of the RR to ground.

On the SH-775 the case is isolated from groudn return (i.e. R/R(-) )

In the case of the Compu Fire , the case is the ground return R/R(-)

 

[Sparkie]

You can neither just replace the stator or try to get some confirmation first from the leg to ground tests. They shoudl report ZERO VAC.
You will also probably find a burned stator.

Sorry but what's mean exactly "leg to ground" ... ?The positive voltmeter lead in one of the stator leads and the negative voltmeter lead in the bike`s frame?

 

[posplayr]

Sorry but what's mean exactly "leg to ground" ... ?The positive voltmeter lead in one of the stator leads and the negative voltmeter lead in the bike`s frame?

GND = Engine case or Frame

 

[Sparkie]

By far the most productive test is leg ground not leg leg.

Yes posplayr!! You have the reason. I just make the stator test leg to ground, and only one lead give me Zero VAC. The other two give differents values (like crazy). Definitely I have to buy a new stator.

 

[posplayr]

Yes posplayr!! You have the reason. I just make the stator test leg to ground, and only one lead give me Zero VAC. The other two give differents values (like crazy). Definitely I have to buy a new stator.

This might clear up what is going on with the stator testsing and why it can be seemingly inconclusive.

Reading just this limited amount of information, there should be ample information to conclude that the testing of a stator amounts to the testing of the insulation. Insulation tests can not be done conclusively with a low voltage ohm meter (like measuring sub ohm resistance with a 9V battery).

Standard engineering insulation tests that have been developed are based on much higher voltage breakdown. Unless there is a high voltage consistent with the expected operational range of use, then any positive test results will be inconclusive

So when I say a conventional stator test (non - MEGGER) can only unambiguously proves a fault, it is because it those tests do not fully test the stator to the level required in operational use, then concluding that the stator will pass in operational use leaves a large gap in performance and therefore an apparent ambiguity in the results.

The stator test is only valid is it fails, as if it fails at a low level you can be assured it will fail at a higher level. I can state this in the following RULES for testing stators.

This brings us to the following LAWS for Stator testing (i.e. those related to Phase B of the stator pages)


FIRST LAW OF STATOR TESTS:
ANY POSITIVE RESULT of a STATOR TEST HAS AN AMBIGUITY PROPORTIONAL TO THE UNTESTED OPERATIONAL STRESS.

SECOND LAW OF STATOR TESTS:
ANY NEGATIVE RESULT of a STATOR TEST IS A NECESSARY AND SUFFICIENT CONDITION TO DECLARE A STATOR BAD.

https://www.thegsresources.com/_for...AW-of-Stator-testing&highlight=stator+testing

 

[bonanzadave]

Good call Jim. One more thing to add to my spring "to do" list. When I changed my RR I did the stator VAC test but not the leg to ground test. I might start looking for a stator too.........

Is there any explanation for his anomaly where his HL and BL cause a no charge condition ?

 

[posplayr]

Good call Jim. One more thing to add to my spring "to do" list. When I changed my RR I did the stator VAC test but not the leg to ground test. I might start looking for a stator too.........

Is there any explanation for his anomaly where his HL and BL cause a no charge condition ?

This post


https://www.thegsresources.com/_for...0EX-Regulator-Rectifier&p=2578312#post2578312

You probably do not have enough power coming from your stator and so the charging system can not deliver power/voltage under standard loads.

.

 

[Sparkie]

Thank you everybody for your kindness and quick response. When the new stator is installed I will post the result.

One last question... SH775 it's bigger than the original RR and does not fit in its location.

Does anyone a 1100/750 ET or EX bike with the SH775 installed? I don't find a good place to screw it... maybe above the plastic rear fender :/

 

[posplayr]

Thank you everybody for your kindness and quick response. When the new stator is installed I will post the result.

One last question... SH775 it's bigger than the original RR and does not fit in its location.

Does anyone a 1100/750 ET or EX bike with the SH775 installed? I don't find a good place to screw it... maybe above the plastic rear fender :/

It will be a very tight squeeze in the stock location, but I think some people have mounted the R/R to the back side of the same electrical side plate. There is room above and to the left side of the battery.